package com.heima.admin.gateway.filter;

import com.heima.admin.gateway.util.AdminJwtUtil;
import io.jsonwebtoken.Claims;
import lombok.extern.slf4j.Slf4j;
import org.springframework.cloud.gateway.filter.GatewayFilterChain;
import org.springframework.cloud.gateway.filter.GlobalFilter;
import org.springframework.core.Ordered;
import org.springframework.http.HttpStatus;
import org.springframework.http.server.reactive.ServerHttpRequest;
import org.springframework.http.server.reactive.ServerHttpResponse;
import org.springframework.stereotype.Component;
import org.springframework.util.StringUtils;
import org.springframework.web.server.ServerWebExchange;
import reactor.core.publisher.Mono;

/**
 * @Description TODO
 * @Author bo.li
 * @Date 2022/11/7 15:49
 * @Version 1.0
 */
@Component
@Slf4j
public class AuthFilter implements Ordered, GlobalFilter {

    @Override
    public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {
        //判断是否登录，从header拿到token，如果没有token，认为没登录，token过期，未登录，其他放行
        //login  swagger
        ServerHttpRequest request = exchange.getRequest();
        ServerHttpResponse response = exchange.getResponse();

        String path = request.getURI().getPath();
        log.info("---------->{}",path);
       if(path.contains("admin/login/in")){
            return chain.filter(exchange);
      }
        String token = request.getHeaders().getFirst("token");
        log.info("token:{}",token);
        if(StringUtils.isEmpty(token)){
            response.setStatusCode(HttpStatus.UNAUTHORIZED);
            return response.setComplete();
        }

        Claims claimsBody = AdminJwtUtil.getClaimsBody(token);
        int result = AdminJwtUtil.verifyToken(claimsBody);
        if(result == 1 || result == 2){
            response.setStatusCode(HttpStatus.UNAUTHORIZED);
            return response.setComplete();
        }

        //获得token解析后中的用户信息
        Object userId = claimsBody.get("id");
        //在header中添加新的信息
        ServerHttpRequest serverHttpRequest = request.mutate().headers(httpHeaders -> {
            httpHeaders.add("userId", userId + "");
        }).build();
        //重置header
        exchange.mutate().request(serverHttpRequest).build();

        return chain.filter(exchange);
    }

    @Override
    public int getOrder() {
        return 0;
    }
}